[7265] | 1 | <?php |
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| 2 | |
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| 3 | /* |
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| 4 | * This file is part of the Assetic package, an OpenSky project. |
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| 5 | * |
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| 6 | * (c) 2010-2012 OpenSky Project Inc |
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| 7 | * |
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| 8 | * For the full copyright and license information, please view the LICENSE |
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| 9 | * file that was distributed with this source code. |
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| 10 | */ |
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| 11 | |
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| 12 | namespace Assetic\Asset\Iterator; |
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| 13 | |
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| 14 | /** |
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| 15 | * Asset collection filter iterator. |
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| 16 | * |
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| 17 | * The filter iterator is responsible for de-duplication of leaf assets based |
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| 18 | * on both strict equality and source URL. |
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| 19 | * |
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| 20 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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| 21 | */ |
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| 22 | class AssetCollectionFilterIterator extends \RecursiveFilterIterator |
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| 23 | { |
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| 24 | private $visited; |
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| 25 | private $sources; |
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| 26 | |
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| 27 | /** |
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| 28 | * Constructor. |
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| 29 | * |
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| 30 | * @param AssetCollectionIterator $iterator The inner iterator |
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| 31 | * @param array $visited An array of visited asset objects |
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| 32 | * @param array $sources An array of visited source strings |
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| 33 | */ |
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| 34 | public function __construct(AssetCollectionIterator $iterator, array $visited = array(), array $sources = array()) |
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| 35 | { |
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| 36 | parent::__construct($iterator); |
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| 37 | |
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| 38 | $this->visited = $visited; |
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| 39 | $this->sources = $sources; |
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| 40 | } |
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| 41 | |
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| 42 | /** |
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| 43 | * Determines whether the current asset is a duplicate. |
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| 44 | * |
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| 45 | * De-duplication is performed based on either strict equality or by |
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| 46 | * matching sources. |
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| 47 | * |
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| 48 | * @return Boolean Returns true if we have not seen this asset yet |
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| 49 | */ |
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| 50 | public function accept() |
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| 51 | { |
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| 52 | $asset = $this->getInnerIterator()->current(true); |
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| 53 | $duplicate = false; |
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| 54 | |
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| 55 | // check strict equality |
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| 56 | if (in_array($asset, $this->visited, true)) { |
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| 57 | $duplicate = true; |
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| 58 | } else { |
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| 59 | $this->visited[] = $asset; |
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| 60 | } |
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| 61 | |
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| 62 | // check source |
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| 63 | $sourceRoot = $asset->getSourceRoot(); |
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| 64 | $sourcePath = $asset->getSourcePath(); |
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| 65 | if ($sourceRoot && $sourcePath) { |
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| 66 | $source = $sourceRoot.'/'.$sourcePath; |
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| 67 | if (in_array($source, $this->sources)) { |
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| 68 | $duplicate = true; |
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| 69 | } else { |
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| 70 | $this->sources[] = $source; |
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| 71 | } |
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| 72 | } |
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| 73 | |
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| 74 | return !$duplicate; |
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| 75 | } |
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| 76 | |
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| 77 | /** |
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| 78 | * Passes visited objects and source URLs to the child iterator. |
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| 79 | */ |
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| 80 | public function getChildren() |
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| 81 | { |
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| 82 | return new self($this->getInnerIterator()->getChildren(), $this->visited, $this->sources); |
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| 83 | } |
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| 84 | } |
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